blood arts

-Bug Fixes:
1: The blood vial now appears empty instead of disappearing in recipes.
2: The blood ring's tooltip has been updated to show the correct amulet values.
3: It is no longer possible to use the blood XP book without being a blood mage.

-Rebalancing:
1: Rival mage now has 30 more health, no longer appears in pillager raids, and now has more armor, knockback resistance, and knockback.
2: The blood ring no longer grants blood power; its attributes have been reworked, and it now dynamically grants attributes based on blood power.
3: Leveling up as a blood mage now only increases health and damage by 0.2 from level 1 to 2 and 2 to 3, and increases health and damage by 2 and 0.5 from level 3 to 4.
4: The damage upgrade only grants +0.5 damage, not 1.

-Changes:
1: The book dropped by the rival mage now serves to level up the player 3 to 4.
2: The book that levels up from level 1 to 2 now also levels up from level 2 to 3 and now has a recipe.

-Additions:

1: Book that levels up the player from level 3 to 4, level 4 blood mage.